A single gust of wind carries more weight than most anime carry in twelve episodes. The music isn't a backdrop, it's the story, and the children are just there to let you feel what it's trying to say. This is what happens when you stop trying to mean something and just let something mean itself.
A soft, pleasant breeze drifts over a group of children at a park. Presented as a single-episode music video, the short piece centers on that gentle moment of wind passing through the scene.